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P43019B21 — Memory Specs & Substitutes

✓ Verified by PartsTable
HP · MEMORY · RDIMM
WHAT YOU NEED TO KNOW
Memory is a hot market right now. DDR5 and DDR4 are extremely volatile with data centers driving availability to extreme lows. Always validate machine type and model. Remember: all RAM is Hynix, Samsung, or Micron underneath OEM labels — use that to find alternatives. Key checks: Double-check what you're quoting in volatile market.
HOT market — DDR5/DDR4 extremely volatile
PRODUCT OVERVIEW
HP 16GB (1x16GB) SINGLE RANK X8 DDR4-3200 CAS-22-22-22

HP 16GB (1x16GB) SINGLE RANK X8 DDR4-3200 CAS-22-22-22. Key specifications include Rank: Dual Rank (2R), Speed: DDR4-2933, Voltage: 1.2V, Capacity: 64GB, Form Factor: RDIMM, Organization: x4. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 5962-01-725-5221, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
MEMORY→ RDIMM→ P43019B21
NSN: 5962-01-725-5221
FSC: 5962
CAGE: 7ES51 — HEWLETT PACKARD ENTERPRISE COMPANY (USA)
SPECIFICATIONS
RankDual Rank (2R)
SpeedDDR4-2933
Voltage1.2V
Capacity64GB
Form FactorRDIMM
Organizationx4
NSN5962-01-725-5221
COMPONENT DIAGRAM
ECC 16GB 2Rx4 PC4 — RDIMM HP NOTCH ~133.35 mm DDR4 RDIMM | 16GB | — | PC4 Notch position = DDR4 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR4 RDIMM PN P43019B21 MFR HP 16GB —
KEY FEATURES
•
DDR4 Interface
•
16GB Capacity
•
DDR4 Memory
•
BODY WIDTH: 3.5 INCHES NOMINAL IN
•
BODY LENGTH: 7.5 INCHES NOMINAL IN
•
MEMORY DEVICE TYPE: RAM
•
INCLOSURE CONFIGURATION: DUAL-IN-LINE
•
MEMORY CAPACITY: 16GB GB
TYPICAL APPLICATIONS
  • Server memory expansion for virtualization workloads
  • Database performance optimization (in-memory computing)
  • VDI and remote desktop session hosting
  • High-performance computing (HPC) clusters
  • Mail server and collaboration platform scaling
  • Application server tier expansion
TECHNICAL CHARACTERISTICS
BODY WIDTH3.5 INCHES NOMINAL IN
SPECIAL FEATURESDIMM TYPE: UDIMM; DIMM RANK: SINGLE RACK; DIMM SPEED: 3200MT/S; VOLTAGE 1.2V; WEIGHT: 0.04KG; V
BODY LENGTH7.5 INCHES NOMINAL IN
END ITEM IDENTIFICATION543610-01 SERVER
PART NAME ASSIGNED BY CONTROLLING AGENCYHPE DDR4 STANDARD MEMORY, 16 GB RAM GB
MEMORY DEVICE TYPERAM
INCLOSURE CONFIGURATIONDUAL-IN-LINE
MEMORY CAPACITY16GB GB
BODY HEIGHT0.75 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
SN13974Same_fscGOVERNMENT REGISTRY
same_fsc cross-reference
same_fsc
PS73338-1Same_fscGOVERNMENT REGISTRY
same_fsc cross-reference
same_fsc
US5430JSame_fscGOVERNMENT REGISTRY
same_fsc cross-reference
same_fsc
619293-2Same_fscGOVERNMENT REGISTRY
same_fsc cross-reference
same_fsc
9622DMSame_fscGOVERNMENT REGISTRY
same_fsc cross-reference
same_fsc
MC948LSame_fscGOVERNMENT REGISTRY
same_fsc cross-reference
same_fsc
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 1
P44877-001SUBSTITUTE
HP 16Gb PC4-3200AA-E ECC UB SR x8 DIMM - G10 Plus
HPE
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FREQUENTLY ASKED QUESTIONS
What is P43019B21?
P43019B21 is a HP 16GB (1x16gb) Single Rank X8 DDR4-3200 Cas-22-22-22 manufactured by HP. It is classified as a MEMORY (RDIMM).
What parts can replace P43019B21?
There are 14 known substitutes for P43019B21: SN13974, PS73338-1, US5430J and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for P43019B21?
P43019B21 is cataloged in the Federal Logistics Information System under NSN 5962-01-725-5221. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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Last verified: October 2026